. >> lehrer: gentlemen, thank you very much. >> ifill: engineers in japan pressed forward today with efforts to restore power to that crippled nuclear plant. they made progress over the weekend toward getting the cooling system back on. in washington, a top official with the nuclear regulatory commission said three of the six reactors at the fukushima plant have damage to cores. but he said all are contained, and it appears emergency crews are getting closer to controlling the situation. >> we believe that the spent fuel pools on units three and four-- which had been two components of particular fety concern-- that the situation there is stabilizing, and that the containment in all three units-- one, two, and three-- appear to be functional, and that there's water being injected into the reactor vessels in units one, two, and three. >> lehrer: at one point today, smoke billowed from two of the reactors, but officials reported no increase in radiation. meanwhile, police said the death toll from the earthquake and tsunami has reached 8,800, and could top 18,000. for the survivors, day-to-day l